Note: Descriptions are shown in the official language in which they were submitted.
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AN IMPROVED SETTING TOOL FOR =USE IN SUBTERRANEAN WELLS
RELATED APPLICATIONS
This application claims priority to U.S. Provisional Application No.
62/131,503, filed
March 11, 2015, U.S. Provisional Application No. 62/131,595 filed March 11,
2015, and to U.S.
Provisional Application No. 62/131,578, filed March 11, 2015.
BACKGROUND OF THE INVENTION
Bridge plugs are often introduced or carried into a subterranean oil or gas
well on a
conduit, such as wire line, electric line, continuous coiled tubing, threaded
work string, or the
like, for engagement at a pre-selected position within the well along another
conduit having an
inner smooth inner wall, such as casing. The bridge plug is typically expanded
and set into
position within the casing. The bridge plug effectively seals off one section
of casing from
another. Several different completions operations may commence after the
bridge plug is set,
including perforating and fracturing. Sometimes a series of plugs are set in
an operation called
"plug and perf' where several sections of casing are perforated sequentially.
When the bridge
plug is no longer needed the bridge plug is reamed, often though drilling,
reestablishing fluid
communication with the previously sealed off portion of casing.
Setting a bridge plug typically requires setting a "slip" mechanism that
engages and locks
the bridge plug with the casing, and energizing the packing element in the
case of a bridge plug.
This requires large forces, often in excess of 20,000 lbs. The activation or
manipulation of some
setting tools involves the activation of an energetic material such as an
explosive pyrotechnic or
black powder charge to provide the energy needed to deform a bridge plug. The
energetic
material may use a relatively slow burning chemical reaction to generate high
pressure gases.
One such setting tool is the Model E-4 Wireline Pressure Setting Tool of Baker
International
Corporation, sometimes referred to as the Baker Setting Tool.
After the bridge plug is set, the explosive setting tool remains pressurized
and must be
raised to the surface and depressurized. This typically entails bleeding
pressure off the setting
tool by piercing a rupture disk or releasing a valve.
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SUMMARY OF EXAMPLES OF THE INVENTION
An example of an embodiment may include a quick connect device for well tools
comprising a substantially cylindrical upper connection body about an axis
having a first end and
a second end, a resilient member, a pin grip insert having a substantially
cylindrical body about
an axis, a first end, a second end, an inclined outer surface having larger
diameter proximate the
first end and a smaller diameter proximate the second end, a threaded inner
bore, an upper
shoulder orthogonal to the axis, a pin capture socket having a substantially
cylindrical body
about an axis, a first end, a second end, an inclined inner surface about a
conical bore along the
axis having a larger diameter proximate the first end and a smaller diameter
proximate the
second end, wherein the axes of the upper connection body, the pin grip
insert, and the pin
capture socket are aligned, the pin grip insert is constructed of a plurality
of radial segments, the
pin grip insert is captured within the conical bore of the pin capture socket,
the resilient member
is captured between the upper shoulder of the pin grip insert and the second
end of the upper
connection body, and the upper connection body is affixed to the first end of
the pin capture
socket.
A variation of the quick connect device may include the resilient member
biasing the pin
grip insert towards the second end of the pin capture socket. The quick
connect device may have
the threaded inner bore of the pin grip insert that further comprises buttress
threads having the
load bearing face oriented toward the first end of the pin grip insert. The
quick connect device
may have the pin grip insert further comprising a lock screw hole extending
radially from the
outer surface into each of the plurality of radial segments, the pin capture
socket further
comprises a plurality of lock screw slots extending from an outer surface of
the pin capture
socket through the inclined inner surface, a plurality of lock screws extend
through the lock
screw slots in the pin capture socket and into the lock screw holes in the pin
grip insert, securing
the pin grip insert inside the pin capture socket.
A variation of the quick connect device may include a plurality of lock screw
ramps in
the outer surface of the pin capture socket corresponding to and proximate
with the plurality of
lock screw slots, each having a first end proximate the first end of the pin
capture socket at a first
distance from the pin capture socket axis and a second end a second, smaller,
distance from the
axis, wherein the lock screws are adapted to engage the lock screw ramps and
couple the
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longitudinal and axial movement of the pin grip insert segments' movement to
the lock screw
ramps. The quick connect device may have the lock screw ramps, inner surface
of the pin
capture socket, and outer surface of the pin grip insert aligned with the same
angle relative to the
axis.
A variation of the quick connect device may include a holding ring adapted to
slide over
the outer surface of the pin capture socket having a plurality of lock screw
receptacles adapted to
couple with a plurality of head portions of the plurality of lock screws,
wherein the translation of
the holding ring toward the first end of the pin capture socket causes the
lock screws and pin grip
insert to translate longitudinally and axially, opening the inner threaded
bore of the pin grip
insert and release of the holding ring allows the resilient member to bias the
pin grip insert
toward the second end of the pin capture socket, closing the inner threaded
bore of the pin grip
insert.
A variation of the quick connect device may include the resilient member being
a
compression spring. A further variation may include the compression spring
being a wave
spring. The quick connect may further comprise a pin having a first threaded
end engaged with
the internal threaded bore of the pin grip insert and a second threaded end
adapted to engage a
well tool. The second threaded end of the pin may be adapted to engage a
wellbore plug. The
first end of the upper connection body may be adapted to connect to a setting
tool. The second
end of the upper connection body may be threaded into the first end of the pin
capture socket.
Another example of an embodiment of the quick connect device may comprise a
capture
socket having a substantially cylindrical body about at axis and an inclined
inner wall having a
first diameter at a first end and smaller second diameter at a second end, a
plurality of buttress
thread inserts each having a first end, a second end, an inner surface with
buttress threads
thereon, and an outer surface inclined relative to the inner surface such that
the outer surface is
closer to the inner surface near the second end than the first end, and an end
shoulder proximate
the second end, an uphole connection body having a first end and a second end
connected to the
first end of the capture socket, and a spring, wherein the plurality of
buttress thread inserts are
arranged inside the capture socket such that their inner surfaces form a
continuously threaded
hole, the second end of the plurality of buttress thread inserts is near the
second end of the
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capture socket, and the spring is captured and compressed between the second
end of the uphole
connection body and the end shoulders of the plurality of buttress thread
inserts.
An example of an embodiment may include a setting tool for use in setting a
bridge plug
comprising a housing, an upper piston, an upper cylinder, a lower piston, a
lower cylinder, and a
piston rod having a circumferential groove adapted to interface with the lower
piston via a
coupling means, wherein the upper piston and lower piston are hydraulically
coupled together.
A variation of the embodiment may include the coupling means being at least
one cap
screw. The coupling means may be at least two cap screws. The lower piston may
comprise two
threaded through holes, one hundred and eight degrees opposite of each other.
The embodiment
may further comprise a crosslink engaged to the piston rod, a crosslink sleeve
engaged to the
crosslink, and a bridge plug interfaced with the crosslink sleeve. The
coupling means may be a
spring loaded ball detent. The coupling means may be a pin. The coupling means
may be a
slotted key.
An example of an embodiment may include an apparatus for use in a setting tool
comprising a cylindrical solid piston rod having a first end adapted to
interface with a lower
piston by sliding into the bore of a lower piston, the piston rod having a
circumferential groove
proximate to the first end, wherein the lower piston and the piston rod is
coupled to the piston
rod and the circumferential groove is further adapted to interface with the
lower piston via a
coupling means.
A variation of the embodiment may include the coupling means being at least
one cap
screw. The coupling means may be at least two cap screws. The lower piston may
further
comprise two threaded through holes, one hundred and eight degrees opposite of
each other. The
embodiment may further comprise the piston rod having a second end adapted to
engage a
crosslink. The coupling means may be a spring loaded ball detent. The coupling
means may be a
pin. The coupling means may be a slotted key.
An example of an embodiment may include a method of retrofitting a setting
tool that
comprising an upper piston, a lower cylinder, a lower piston, a first piston
with a through hole,
and a crosslink by replacing the first piston with a second piston having a
circumferential groove
adapted to interface with the lower piston via a coupling means, the method
comprising the steps
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of disassembling the crosslink from the lower cylinder, disassembling the
lower cylinder,
removing the first piston, installing the second piston, reassembling the
lower cylinder; and
assembling the crosslink with the lower cylinder.
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BRIEF DESCRIPTION OF THE DRAWINGS
For a thorough understating of the present invention, reference is made to the
following
detailed description of the preferred embodiments, taken in conjunction with
the accompanying
drawings in which reference numbers designate like or similar elements
throughout the several
figures. Briefly:
FIG. us cross section of an example wireline setting tool.
FIG. 2 is a cross section an example a wireline setting tool combined with a
quick
connector and a bottom set bridge plug.
FIG. 3 is a cross section of an example wireline setting tool combined with a
quick
connector and a top set bridge plug.
FIG. 4 is a cross section of an example piston rod.
FIG. 5 is an exploded assembly drawing of an example quick connector.
FIG. 6 is a cross section of an example quick connector assembly.
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DETAILED DESCRIPTION OF EXAMPLES OF THE INVENTION
In the following description, certain terms have been used for brevity,
clarity, and
examples. No unnecessary limitations are implied and such terms are used for
descriptive
purposes only and are intended to be broadly construed. The different
apparatus and method
steps described herein may be used alone or in combination with other systems
and method steps.
It is to be expected that various equivalents, alternatives, and modifications
are possible within
the scope of the presented claims.
An example embodiment is illustrated in the wireline setting tool 15 of FIG.
1. The
setting tool 1 includes a ported bleeder sub 2, an upper piston 3, and an
upper cylinder 4. A
tandem connector 5 connects the upper cylinder 4 with the lower cylinder 12.
The lower cylinder
12 contains a lower piston 6, a piston rod 7, and a cylinder head 8. A
crosslink 10, crosslink
retaining ring 13, and the crosslink sleeve 11 are linked to the lower piston
6 via the piston rod 7.
The setting mandrel 9 is fixed to the cylinder head 8 and hence the lower
cylinder 12. The setting
tool also includes a puncture disc 14 in bleeder sub 2. In this example a pin
protector 23 is
attached to the end of the setting tool, however the pin protector 23 would be
removed during a
wireline job and a sub may be attached.
In typical operation a gas generating power charge 1 is electrically ignited.
The gases
generated by the power charge 1 exert pressure on upper piston 3, which then
compresses oil
reservoir 27. The oil travels through the tandem connector 5 and exerts
pressure on lower piston
6. The resulting movement of lower piston 6 causes piston rod 7 to move as
well. Crosslink
sleeve ills connected to the piston rod 7 via crosslink retaining ring 13 and
crosslink 10. As the
crosslink sleeve 11 moves in relation to setting mandrel 9, which stays
stationary relative to the
lower cylinder 12, a setting sleeve 28 of an attached bridge plug also moves.
The difference in
movement between the crosslink sleeve 11 and the setting mandrel 9 causes a
bridge plug to
expand and set in the wellbore.
Prior piston rods had a through hole near the end that engages the lower
piston. In the
prior art these through holes would line up with through holes on opposite
radial locations of the
lower piston. The piston rod would be inserted into the back end of the lower
piston, the holes
would be aligned, and a pin would be placed through the aligned holes. It is
well known that a
through hole acts as a stress concentrator that can cause stresses seen by the
rod around the hole
to several times higher than the average stress seen in the piston rod. As a
result, during
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operation the through hole on the piston rod deforms due to the pressures
exerted on the piston.
A single operation may be enough to cause deformation. The pin is generally
expected to deform
as well, therefore a soft metal must be used in order to make extraction of
the pin possible during
redress. Typically a hammer and pin are used to force out the warped pin stuck
in the warped
through hole. In some older designs hard materials were used for the pin,
resulting in the piston
and piston rod becoming permanently joined.
In this example, the piston rod 7 does not have a typical through hole and pin
combination to connect it with the lower piston 6. Instead, in this embodiment
it has a
circumferential groove 26. Screws 20 engage the retainer groove 26 and fix it
to the lower piston
6. A single screw could be used, a plurality of two or more screws could be
used. Other fasteners,
including spring loaded ball detents could be used as the fastening means in
this example. The
advantage of this design is that there is no through hole to deform in the
piston rod. This results
in a stronger piston rod 7 overall. Redress of the setting tool is faster
without a stuck piston rod.
Further, maintenance cost are reduced as the life of the piston rod is
extended. A warped through
hole on a piston rod cannot be easily reused.
Alternatives to this example piston rod 7 may include a plurality of
circumferential
grooves rather than a single groove. Another alternative could be one or more
indentations
located on the surface of the piston rod 7 in place of a groove. Spring loaded
detents or screws
could engage the piston to the piston rod via those indentations. In another
alternative the set
screws could simply tighten against the radial surface of the piston rod 7
without a
circumferential groove and rely on friction to keep the lower piston 6
fastened to the piston rod 7.
An example of an embodiment is shown in FIG. 2 including a wireline setting
tool 100
combined with a quick connect device 220 and a bottom set bridge plug 200. The
wireline
setting tool 100 comprises a power charge chamber 101, a ported bleeder sub
102, an upper
piston 103, an upper cylinder 104, a tandem connector 105, a lower piston 106,
a piston rod 107,
a lower cylinder 113, and a cylinder head 108. Ported bleeder sub 102 has a
puncture disc 121
for relieving pressure in wireline setting tool 100. The setting mandrel 109
is fixed to the
cylinder head 108. A crosslink 110 is connected to the crosslink sleeve 111. A
crosslink retaining
ring 114 holds the crosslink sleeve 111 in place. A setting sleeve 210 is
connected to the
crosslink sleeve 111. The setting sleeve 210 and the mandrel 109 can move
independently of
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each other. Lower piston 106 is connected to piston rod 107 using setscrews
112 that engage a
circumferential groove 126 cut into the outer surface of the piston rod 107.
A quick connect device 220 connects the mandrel 109 to the bridge plug 200.
The quick
connect device 220 includes pin grip insert 223, uphole connection 226, and a
quick click pin
227. The quick click pin 227 screws into the mandrel 229 of the bridge plug
200.
The bridge plug 200 includes rubber cone with metal backup rings 201, a slip
setting ring
202, a slip setting ring 203, a slip 204, a ratchet ring 206, and a rubber
seal 207, and the mandrel
229. Shear stud 230 allows the wireline setting tool 100 to separate from the
bridge plug 200
after setting.
When the power charge 101 is fired a jet of hot gas will act upon upper piston
103. Upper
cylinder 104 is filled with oil 125. The movement of the upper cylinder 104
causes the oil 125 to
move through the tandem connector 105 and act against lower piston 106. The
movement of
lower piston 106 acts against piston rod 107. Piston rod 107 connects to the
setting sleeve 210
via the crosslink sleeve 111. As the setting sleeve 210 moves in relation to
the setting mandrel
109, the bottom set bridge plug 200 collapses and expands, thus engaging and
sealing the
borehole casing.
Another example of an embodiment is shown in FIG. 3 depiction of a wireline
setting
tool 100 combined with a quick connect device 220 and a bridge plug 300. The
wireline setting
tool 100 comprises a power charge chamber 101, a ported bleeder sub 102, an
upper piston 103,
an upper cylinder 104, a tandem connector 105, a lower piston 106, a piston
rod 107, a lower
cylinder 113, and a cylinder head 108. Ported bleeder sub 102 has a puncture
disc 121 for
relieving pressure in wireline setting tool 100. The setting mandrel 109 is
fixed to the cylinder
head 108. A crosslink 110 is connected to the crosslink sleeve 111. A
crosslink retaining ring
114 holds the crosslink sleeve 111 in place. A setting sleeve 210 is connected
to the crosslink
sleeve 111. The setting sleeve 210 and the mandrel 109 can move independently
of each other.
Lower piston 106 is connected to piston rod 107 using setscrews 112 that
engage a
circumferential groove 126 cut into the outer surface of the piston rod 107.
A quick connect device 220 connects the mandrel 109 to the bridge plug 300.
The quick
connect device 220 includes a pin grip insert 223, uphole connection 226, and
a quick click pin
227. The quick click pin 227 screws into the mandrel 228 of the bridge plug
300.
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The top set bridge plug 300 includes rubber cone with metal backup rings 301,
a slip
setting ring 302, a slip setting ring 303, a slip 304, an adapter ring 305, a
ratchet ring 306, and a
rubber seal 307, and the mandrel 228. The mandrel 228 is for a top set design.
When the power charge 101 is ignited, a jet of hot gas will act upon upper
piston 103
Upper cylinder 104 is filled with oil 125. The movement of the upper cylinder
104 causes the oil
to move through the tandem connector 105 and act against lower piston 106. The
movement of
lower piston 106 acts against piston rod 107. Piston rod 107 connects to the
setting sleeve 210
via the crosslink 110 and crosslink sleeve 111. As the setting sleeve 210
moves in relation to the
setting mandrel 109, the bridge plug 300 collapses and expands, thus engaging
and sealing the
borehole casing.
A more detailed example of the piston rod 7 is shown in FIG. 4. The piston rod
7 has
circumferential groove 26. Piston rod 7 fits into lower piston 6. Lower piston
6 has one or more
through holes for a setscrew 20 to engage with the circumferential groove 26
of piston rod 7. In
some applications the fit may have some free play in order to keep the lower
piston 6 from
binding as it travels in the lower cylinder. Prior art designs would use a
through hole in the
piston rod and a single pin would engage the piston rod with the lower
cylinder. The prior art
piston rod experiences tremendous forces when the power charge ignites that
collapse or warp
the through hole. When the through hole warps it traps the pin and prolong the
disassembly
process during redress. Redress of the setting tool is slower with a stuck
piston rod. Typically a
warped pin needs to be hammered out in order to disengage the lower piston
from the piston rod.
Maintenance cost are increased because a warped piston rod must be replaced
instead of reused.
The example shown in FIG. 4 prevents the failure modes known in the prior art
by
relying on the circumferential groove 26 and setscrews 20. The advantage of
this design is that
there is no through hole to deform in the piston rod. This results in a
stronger piston rod 7 overall.
Alternatively, a single screw could be used or a plurality of two or more
screws could be used.
Other fasteners, including spring loaded ball detents, slotted keys, cap
screws, set screws, or
cotter pins could be used as the fastening means in this example. Alternatives
to this example
piston rod 7 may include a plurality of circumferential grooves rather than a
single groove.
Another alternative could be one or more indentations located on the surface
of the rod 7 in place
of a groove. Spring loaded detents or screws could engage the piston to the
piston rod via those
indentations. In another alternative the set screws could simply tighten
against the radial surface
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of the piston rod 7 without a circumferential groove and rely on friction to
keep the lower piston
6 fastened to the piston rod 7.
Quick connect device 220 for connecting a bridge plug to a wireline setting
tool is shown
in FIG. 5 and FIG. 6. The quick connect device 220 has a pin capture socket 71
that has a
threaded inner bore 84. In this configuration three pin grip inserts 72 are
located within the pin
capture socket 71. The pin grip inserts 72 are held in place by resilient
member 81, which may be
a spring, wave spring, compression spring, or some other similar device. The
pushing action by
the resilient member 81 in combination with the inclined inner surface 84
causes the pin grip
inserts 72 to come together. Resilient member 81 forces longitudinal movement
of the three pin
grip insert 72 along the inclined inner surface 84 of the pin capture socket
71. Upper connection
body 74 screws into the pin capture socket 71 using male threads 80 on the
uphole connection
with female threads 79 on the pin capture socket 71. Threads 86 are adapted to
connect to a
mandrel of a wireline setting tool. Holding ring 75 fits over the pin capture
socket 71. Holding
ring 75 in this example has three through holes 83. The through holes 83 are
lined up with the
corresponding slots 82 on the pin capture socket 71. Three set screws 73 are
used in this example
to engage the holding ring 75 with the three pin grip inserts 72 via lock
screw slots 82.
Each pin grip insert 72 has inner threads 76. In this example the threads 76
are buttress
threads, which are designed to mate to corresponding buttress threads 78 on
pin 70. When the
quick connect device 220 is fully assembled, the pin 70 can easily slide into
the pin grip inserts
72, and are locked due to the spring action of resilient member 81. Thus, pin
70 can be inserted
but not removed from the quick connect device 220 without relief from the
resilient member 81.
Moving holding ring 75 away from the pin 70 counteracts the resilient member
81, allowing the
pin grip inserts 72 to separate, thus releasing pin 70.
Alternatives to the embodiment disclosed in FIG.'s 5 and 6 include two tapered
pin grips
instead of three, or more than three tapered pin grips. The threads do not
have to be buttress
threads
The benefits of this quick connect device 220 design include the ease of
assembly large
and heavy components, such as bridge plugs, when putting together a complete
wireline setting
tool assembly. Threading a large and heavy bridge plug to a hanging wireline
setting tool can be
difficult. Using a quick connect device 220, pin 70 is threaded into the
bridge plug using threads
77. The quick connect device 220 is threaded into a wireline setting tool
using threads 86. When
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the wireline setting tool is hanging on the rig, the bridge plug with pin 70
installed can simply
slide into the pin capture socket 71 of the quick connect device 220 and lock
into place. This
single movement does not require any rotation of the bridge plug, thread
alignment, or special
orientation to get the bridge plug secured. The tapered pin grips
automatically lock the bridge
plug into place regardless of radial orientation of the bridge plug. As a
result, all that is required
is a single translation of the bridge plug and pin 70 into the pin capture
socket 71. After the
bridge plus is set downhole, the wireline setting tool is pulled up until pin
70 shears at the narrow
neck 85 as shown in FIG. 6. After retrieval of the wireline setting tool, the
sheared pin 70 is
removed from the quick connect device 220.
An example of an embodiment may include a quick connect device 220 for well
tools
comprising a substantially cylindrical upper connection body 74 about an axis
having a first end
and a second end, a resilient member 81, a pin grip insert 72 having a
substantially cylindrical
body about an axis, a first end, a second end, an inclined outer surface
having larger diameter
proximate the first end and a smaller diameter proximate the second end, a
threaded inner bore
76, an upper shoulder 87 orthogonal to the axis, a pin capture socket 71
having a substantially
cylindrical body about an axis, a first end, a second end, an inclined inner
surface 84 about a
conical bore along the axis having a larger diameter proximate the first end
and a smaller
diameter proximate the second end, wherein the axes of the upper connection
body 74, the pin
grip insert 72, and the pin capture socket 71 are aligned, the pin grip insert
72 is constructed of a
plurality of radial segments, the pin grip insert 72 is captured within the
conical bore of the pin
capture socket 71, the resilient member 81 is captured between the upper
shoulder 87 of the pin
grip insert 72 and the second end of the upper connection body 74, and the
upper connection
body 74 is affixed to the first end of the pin capture socket 71.
A variation of the quick connect device 220 may include the resilient member
81 biasing
the pin grip insert 72 towards the second end of the pin capture socket 71.
The quick connect
device 220 may have the threaded inner bore 76 of the pin grip insert 72 that
further comprises
buttress threads having the load bearing face oriented toward the first end of
the pin grip insert
72. The quick connect device 220 may have the pin grip insert 72 further
comprising a lock
screw hole 88 extending radially from the outer surface into each of the
plurality of radial
segments, the pin capture socket 71 further comprises a plurality of lock
screw slots 82 extending
from an outer surface of the pin capture socket 71 through the inclined inner
surface 84, a
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plurality of lock screws 73 extend through the lock screw slots 82 in the pin
capture socket 71
and into the lock screw holes 88 in the pin grip insert 72, securing the pin
grip insert 72 inside
the pin capture socket 71.
A variation of the quick connect device 220 may include a plurality of lock
screw ramps
in the outer surface of the pin capture socket 71 corresponding to and
proximate with the
plurality of lock screw slots 82, each having a first end proximate the first
end of the pin capture
socket 71 at a first distance from the pin capture socket 71 axis and a second
end a second,
smaller, distance from the axis, wherein the lock screws 73 are adapted to
engage the lock screw
ramps and couple the longitudinal and axial movement of the pin grip insert 72
segments'
movement to the lock screw ramps. The quick connect device 220 may have the
lock screw
is
ramps, inner surface of the pin capture socket 71, and outer surface of the
pin grip insert 72
aligned with the same angle relative to the axis.
A variation of the quick connect device 220 may include a holding ring adapted
to slide
over the outer surface of the pin capture socket 71 having a plurality of lock
screw receptacles
adapted to couple with a plurality of head portions of the plurality of lock
screws 73, wherein the
translation of the holding ring toward the first end of the pin capture socket
71 causes the lock
screws 73 and pin grip insert 72 to translate longitudinally and axially,
opening the inner
threaded bore of the pin grip insert 72 and release of the holding ring allows
the resilient member
81 to bias the pin grip insert 72 toward the second end of the pin capture
socket 71, closing the
inner threaded bore of the pin grip insert 72.
A variation of the quick connect device 220 may include the resilient member
81 being a
compression spring. A further variation may include the compression spring
being a wave spring.
The quick connect may further comprise a pin 70 having a first threaded end 78
engaged with the
threaded inner bore 76 of the pin grip insert 72 and a second threaded end 77
adapted to engage a
well tool. The second threaded end 77 of the pin 70 may be adapted to engage a
wellbore plug.
The first end 81 of the upper connection body 74 may be adapted to connect to
a setting tool. The
second end 80 of the upper connection body 74 may be threaded into the first
end of the pin
capture socket 71.
Another example of an embodiment of the quick connect device 220 may comprise
a
capture socket having a substantially cylindrical body about at axis and an
inclined inner wall
having a first diameter at a first end and smaller second diameter at a second
end, a plurality of
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buttress thread inserts each having a first end, a second end, an inner
surface with buttress
threads thereon, and an outer surface inclined relative to the inner surface
such that the outer
surface is closer to the inner surface near the second end than the first end,
and an end shoulder
proximate the second end, an uphole connection body having a first end and a
second end
connected to the first end of the capture socket, and a spring, wherein the
plurality of buttress
thread inserts are arranged inside the capture socket such that their inner
surfaces form a
continuously threaded hole, the second end of the plurality of buttress thread
inserts is near the
second end of the capture socket, and the spring is captured and compressed
between the second
end of the uphole connection body and the end shoulders of the plurality of
buttress thread
inserts.
Although the invention has been described in terms of particular embodiments
which are
set forth in detail, it should be understood that this is by illustration only
and that the invention is
not necessarily limited thereto. Alternative embodiments and operating
techniques will become
apparent to those of ordinary skill in the art in view of the present
disclosure. Accordingly,
modifications of the invention are contemplated which may be made without
departing from the
spirit of the claimed invention.
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